CN201012736Y - Bicycle stepless transmission - Google Patents
Bicycle stepless transmission Download PDFInfo
- Publication number
- CN201012736Y CN201012736Y CNU2007200831405U CN200720083140U CN201012736Y CN 201012736 Y CN201012736 Y CN 201012736Y CN U2007200831405 U CNU2007200831405 U CN U2007200831405U CN 200720083140 U CN200720083140 U CN 200720083140U CN 201012736 Y CN201012736 Y CN 201012736Y
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- CN
- China
- Prior art keywords
- belt
- strut bar
- speed
- belt pulley
- fixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a continuously variable transmission, which includes a large variable diameter pulley, a small variable diameter pulley, a transmission belt and a speed shifting mechanism for controlling the diameter variation of the pulleys. The large variable diameter pulley and the small variable diameter pulley, which are connected by the transmission belt for transmission, are respectively installed on a medial axis and a back axis of a bicycle. The speed shifting mechanism is fixed in a speed changing box, which arranged between the two pulleys. The utility model has the advantages of simple structure, convenient operation, reliable performances and wide speed variation range, which is applied to the installation and the use of various speed changing bicycles.
Description
Technical field
The utility model relates to derailleur.Specifically, be a kind of bicycle toric transmission.
Background technology
The speed-changing mechanism of bicycle is modal to be internal speed-changing mechanism and outer speed-changing mechanism two big classes.Internal speed-changing mechanism is installed in one group of planetary wheel in the rear axle of bicycle, changes sprocket wheel and is delivered to the different paths of carrier housing by planetary mechanism, to obtain different speed ratios.Outer speed-changing mechanism is a kind of speed-changing mechanism that is most widely used at present, and by multistage flywheel, multi-chain gear wheel is formed, stir chain by dialling the chain device, make itself and different sprocket wheels and different flywheels,, therefore also be the driving chain speed-changing mechanism to obtain different transmission speed ratios.
Internal speed-changing mechanism has only three-step gear shift usually, and gear is few, and its part processing precision requires very high, and structure is more complicated also, has caused a lot of difficulties for manufacturing and maintenance.Outer speed-changing mechanism is worked under harsh environment and is broken down easily because part exposes, as the sandstone invasion and attack, and the corrosion of muddy water, interference of weeds and branch or the like all can cause chain to take off faults such as chain, trip stop.
For solving the problem of said mechanism, the scientific research personnel had once invented a kind of toric transmission.Described toric transmission is made up of taper disc group, wedge type disc group, pressure mechanism and speed regulation control mechanism, has still adopted the structure of sprocket-type.Though speed range has increased a lot, and the performance of device also is enhanced.But the structure of whole device is still very complicated, and owing to still adopt the structure of sprocket-type, is prone to faults such as taking off chain.
Summary of the invention
The purpose of this utility model is in order to solve the deficiency of above-mentioned background technology, proposes a kind of simple in structure, easy and simple to handle, dependable performance and the big bicycle toric transmission of speed range.
At above-mentioned purpose, the outstanding level of the bicycle change-speed box that the utility model is designed, it comprises the speed-changing mechanism of big reducing belt pulley, little reducing belt pulley, drive belt and control belt pulley reducing, big reducing belt pulley and little reducing belt pulley are installed in respectively on the axis and rear axle of bicycle, connect transmission with drive belt, speed-changing mechanism is fixed in the speed change box between two belt pulleys; Described change-speed box also includes a belt pulley stretching device, this mechanism is made up of screw rod, bearing pin, adjusting knurl, strut bar and secondary strut bar, adjusting knurl is installed in the belt grooves of reducing belt pulley, be fixedly linked with transverse axis, cross-drilled hole sliding block joint in the other end of transverse axis and the screw rod, screw rod is fixed in the speed change box; Two symmetrical bearing pins are arranged on adjusting knurl, fix a strut bar respectively, the pulley on the strut bar is propped up belt, is connected with a secondary strut bar at the strut bar middle part, and the secondary strut bar other end is fixed on the screw rod, the chute sliding block joint at the other end and strut bar middle part.
Also be provided with a transition mechanism in the belt tension mechanism, this mechanism is mounted between strut bar and the little diameter-changing wheel, form by transition bearing and lever, balance pivot is fixed on the wallboard of speed change box, pulley is installed on the bearing, be arranged on the belt outside, roller by being arranged on the lever other end and the skewback bearing fit actuating spindle pressure-bearing in the speed change box are lived belt.The bearing pin both sides is individual to be fixed with an oval groove, and an end of secondary strut bar is fixed in the groove.Adjusting knurl have two, be installed in respectively in the belt grooves of big diameter-changing wheel and little diameter-changing wheel.
The utility model has adopted reducing belt pulley and the belt main body as transmission system, the structure that has replaced the sprocket-type of original bicycle speed-varying unit, make speed range become forward and backward belt pulley radius and freely change, make up resulting countless versions speed ratio, eliminated the employing chain sprocket structure simultaneously and the incidental fault such as chain of taking off by the fixing fixing several speed ratios that pass through different wheel discs combination speed changes.Replaced original chain with belt, made, and during maintenance, belt is than the easier replacing of chain because the fault that chain is caused by corrosion has all been eliminated.In change-speed box, be provided with belt tension mechanism, solved when diameter-changing wheel reducing speed change, the problem that unnecessary belt can't digest, and belt can not skidded in transmission process.
Description of drawings
Fig. 1 is the structural representation of bicycle toric transmission;
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail:
As shown in Figure 1, big reducing belt pulley 1 is installed on bicycle middle shaft, little reducing belt pulley 2, two belt pulleys is installed on the rear axle is connected transmission by belt 3.Be fixed with a speed change box between two reducing belt pulleys, the box internal fixation has speed-changing mechanism, and described speed-changing mechanism is for regulating the regulating mechanism of reducing belt pulley reducing.
Between two reducing belt pulleys, be fixed with the belt pulley stretching device, be used for the unnecessary belt 3 of digestion when reducing belt pulley radius diminishes.On the left side of big reducing belt pulley 1, a cover skewback 17 is respectively adorned on the right of little reducing belt pulley 2, and they are movably connected on the control bracket, moves to the microcephaly when the reducing diameter pulley becomes big skewback 17, and diminish skewback 17 of diameter is return to major part.In the middle of two reducing belt pulleys, each is equipped with an adjusting screw(rod) 4, and nut seat lower end cross-drilled hole 10 is respectively adorned a transverse axis 5, and is fixed on the control bracket.In the bearing hole of transverse axis 5, the rotating shaft of adjusting knurl 6 is housed, and with positive and negative nut two flange screws in bearing hole.Upper and lower at bearing hole is equipped with two isometric pins 11, and respectively is equipped with a strut bar 7, is that pitch has a pair of local engaging gear with two pitch-rows, and is flat permanent during strut bar 7 motions, symmetrical two bars.The little movable wheel of strut bar 7 other ends cooperates with belt 3.In the oval grooves, a pair of secondary strut bar 8 is housed in addition in the middle of strut bar 7, the roller in the groove is connected on the secondary strut bar 8 with bearing pin, the other end be fixed on control bracket on cooperate with the bearing pin activity.When the reducing diameter pulley becomes big, adjusting knurl 6, strut bar 7, secondary strut bar 8 moves together, are subjected to secondary strut bar 8 attachment point top power, and strut bar 7 is outwards propped up, and the little movable wheel in strut bar 7 other ends holds up belt 3 to reversing sense, help belt 3 mobile backward.Owing to the reducing belt pulley is equidistant moving, in the process that big reducing belt pulley 2 diminishes, little reducing belt pulley 3 becomes greatly simultaneously, but little reducing belt pulley 3 can't digest the unnecessary belt 2 that big reducing belt pulley 1 diminishes and produces after becoming greatly.Between little reducing belt pulley 2 and little movable wheel, load onto a transition bearing 13, link together with bearing pin and lever 14, the strong point 15 usefulness in the middle of the lever 14 axle is fixed on the wallboard of speed change box, lever 14 other end rollers 16 are along 17 up-and-down movements of the skewback on the support, force transition bearing 13 to compress belt 3, unnecessary belt 3 is fallen in digestion effectively, finishes speed change jointly.Transverse axis 5 both sides are fixed with an oval groove 18, and an end of secondary strut bar 8 is fixed in the groove.Adjusting knurl 6 have two, be installed in respectively in the belt grooves 9 of two diameter-changing wheels.
A pair of lever 14 and the driving disk that is complementary, be fixed on the axis two ends, be equipped with foot-operated on 14 1 on lever, roller 16 on the little axle in other end is contained in the driving disk circular groove, after lever 14 is stressed, roller 16 is slided in the lever carriage by annular groove track effect activation lever 14, because displacement before and after the circular groove, and pre-large post-small, both direction is equidistant up and down, so lever 14 elongation forward, when foot-operated return, lever 14 forces it to recover virgin state under the circular groove effect, that is to say that lever 14 extends forward, and other several directions do not have much variations.
Claims (4)
1. bicycle toric transmission, it comprises the speed-changing mechanism of big reducing belt pulley (1), little reducing belt pulley (2), drive belt (3) and control belt pulley reducing, it is characterized in that:
Big reducing belt pulley (1) and little reducing belt pulley (2) are installed in respectively on the axis and rear axle of bicycle, and with drive belt (3) connection transmission, speed-changing mechanism is fixed in the speed change box between two belt pulleys;
Described change-speed box also includes a belt pulley stretching device, this mechanism is made up of screw rod (4), bearing pin (5), adjusting knurl (6), strut bar (7) and secondary strut bar (8), adjusting knurl (6) is installed in the belt grooves (9) of reducing belt pulley, be fixedly linked with transverse axis (5), cross-drilled hole (10) sliding block joint in the other end of transverse axis (5) and the screw rod (4), screw rod (4) is fixed in the speed change box; Two symmetrical bearing pins (11) are arranged on adjusting knurl (6), fix a strut bar (7) respectively, pulley on the strut bar (7) is propped up belt (3), be connected with a secondary strut bar (8) at strut bar (7) middle part, secondary strut bar (8) one ends are fixed on the screw rod (4), chute (12) sliding block joint at the other end and strut bar (7) middle part.
2. bicycle toric transmission according to claim 1, it is characterized in that: also be provided with a transition mechanism in the belt tension mechanism, this mechanism is mounted between strut bar (7) and the little diameter-changing wheel (2), form by transition bearing (13) and lever (14), balance pivot (15) is fixed on the wallboard of speed change box, the transition bearing is equipped with pulley on (13), be arranged on belt (3) outside, push down belt (3) by the roller (16) and the control transition bearing of skewback (17) bearing fit in the speed change box (13) that are arranged on lever (14) other end.
3. bicycle toric transmission according to claim 1 is characterized in that: transverse axis (5) both sides is fixed with an oval groove (18), and an end of secondary strut bar (8) is fixed in the groove.
4. bicycle toric transmission according to claim 1 is characterized in that: adjusting knurl (6) have two, be installed in respectively in the belt grooves (9) of two diameter-changing wheels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200831405U CN201012736Y (en) | 2007-01-11 | 2007-01-11 | Bicycle stepless transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200831405U CN201012736Y (en) | 2007-01-11 | 2007-01-11 | Bicycle stepless transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201012736Y true CN201012736Y (en) | 2008-01-30 |
Family
ID=39024519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200831405U Expired - Fee Related CN201012736Y (en) | 2007-01-11 | 2007-01-11 | Bicycle stepless transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201012736Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103738457A (en) * | 2013-12-25 | 2014-04-23 | 桂林电子科技大学 | Bicycle stepless speed change device |
| CN108974232A (en) * | 2018-06-20 | 2018-12-11 | 安徽工程大学 | Bicycle with stepless speed change |
-
2007
- 2007-01-11 CN CNU2007200831405U patent/CN201012736Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103738457A (en) * | 2013-12-25 | 2014-04-23 | 桂林电子科技大学 | Bicycle stepless speed change device |
| CN103738457B (en) * | 2013-12-25 | 2016-06-01 | 桂林电子科技大学 | Stepless speed variator for bicycle |
| CN108974232A (en) * | 2018-06-20 | 2018-12-11 | 安徽工程大学 | Bicycle with stepless speed change |
| CN108974232B (en) * | 2018-06-20 | 2020-03-27 | 安徽工程大学 | Stepless speed changing bicycle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080130 Termination date: 20100211 |